14 citations · 14 across the 1 of their papers we have counts for
7 papers
Spin-roton excitations in the cuprate superconductors
J. W. Mei, Z. Y. Weng
We identify a new kind of elementary excitations, spin-rotons, in the doped Mott insulator. They play a central role in deciding the superconducting transition temperature Tc, resu…
Nature of spin-charge separation
Z. Y. Weng, D. N. Sheng, C. S. Ting
Quasiparticle properties are explored in an effective theory of the model which includes two important components: spin-charge separation and unrenormalizable phase shift. We…
Marginal Fermi Liquid with a Two-Dimensional Patched Fermi Surface
A. Ferraz, T. Saikawa, Z. Y. Weng
We consider a model composed of Landau quasiparticle states with patched Fermi surfaces (FS) sandwiched by states with flat FS to simulate the ``cold'' spot regions in cuprates. We…
Why T_c is too high when antiferromagnetism is underestimated? --- An understanding based on the phase string effect
Z. Y. Weng
It is natural for a Mott antiferromagnetism in RVB description to become a superconductor in doped metallic regime. But the issue of superconducting transition temperature is highl…
Magnetic Incommensurability in Doped Mott Insulator
Z. Y. Weng, D. N. Sheng, C. S. Ting
In this paper we explore the incommensurate spatial modulation of spin-spin correlations as the intrinsic property of the doped Mott insulator, described by the model. We sho…
Mean-Field Description of Phase String Effect in the Model
Z. Y. Weng, D. N. Sheng, C. S. Ting
A mean-field treatment of the phase string effect in the model is presented. Such a theory is able to unite the antiferromagnetic (AF) phase at half-filling and metallic phas…